Cat scanner with simultaneous translation and rotation of objects
First Claim
1. A computed tomography scanner comprising a source of penetrating energy, detector means positioned to receive said rays from said source, means for translating an object along a translation path to interpose said object between said source and said detector, computer means responsive to said detector for constructing a tomographic image of said object, said means for rotating said object concurrently with said translation.
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Abstract
A dynamic computed tomographic X-ray scanner concurrently translates and rotates an object as it passes through an X-ray field. This compound motion makes it unnecessary to perform sequential passes or to relocate X-ray equipment between passes to complete a scan. A conveyor may carry a series of closely spaced turntables to give greatly increased throughput; and coordinated translation and rotation, whereby all objects give comparable images, permitting the images to be compared to find defective products. Preferred geometries greatly simplify the image reconstruction mathematics, particularly where the X-ray source is at the center of a circular object path.
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Citations
22 Claims
- 1. A computed tomography scanner comprising a source of penetrating energy, detector means positioned to receive said rays from said source, means for translating an object along a translation path to interpose said object between said source and said detector, computer means responsive to said detector for constructing a tomographic image of said object, said means for rotating said object concurrently with said translation.
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2. A computed tomography scanner comprising a source of penetrating energy, detector means positioned to receive said rays from said source, means for translating an object along a translation path to interpose said object between said source and said detector, computer means responsive to said detector for constructing a tomographic image of said object, and means for rotating said object concurrently with said translation, said object rotation occurring about an axis non-parallel to said translation path.
- 16. A computed tomography penetrating energy scanner comprising means for conveying a plurality of objects through a penetrating energy beam in sufficiently close succession that at least two of said objects are within said penetrating energy beam for at least some positions of said conveyor, means associated with said conveying means for rotating said objects while they are in said penetrating energy beam, means for gathering penetrating energy images of said objects while they are within said penetrating energy beam, and means responsive to said penetrating energy images for computing an internal image of said objects.
Specification